中国激光, 2000, 27 (12): 1111, 网络出版: 2006-08-09
CO2激光加热局域热固定LiNbO3光折变全息的温度影响
Temperature Dependence of the Photorefractive Hologram Locally Thermo-fixed by CO2 Laser Heating LiNbO3
CO2激光热固定 局域性系数 平均空间电荷场幅度 thermal fixing by CO2 laser the localization coefficient the average space charge field amplitude
摘要
利用CO2激光加热铌酸锂(LiNbO3)光折变晶体可局域固定体全息,但形成的温度场空间上是不均匀的。在对固定显影后空间电荷场幅度Esc与固定温度Tf的关系进行理论分析的基础上,通过定义局域性系数和平均空间电荷场幅度两个判据,来评价不同的激光加热温度场的固定效果。这种方法也适用于对其他各类边界条件的CO2激光加热温度场局域热固定进行分析。
Abstract
CO2 laser has been suggested to heat the LiNbO3 for locally thermal fixing photorefractive hologram.Here a heating model is theoretically analysed and the stable temperature fields for demonstration aim are obtained.Based on the analysis of the relation between the fixed space charge field amplitude Esc and the fixing temperature Tf,two parameters,the localization coefficient Ψ and the average space charge field amplitude Eavesc ,are defined to evaluate the fixed local photorefractive hologram by CO2 laser heating the LiNbO3.The same analysis can also be used when boundary conditions and laser beam profile are changed.
李建郎, 刘立人, 刘友文, 周常河. CO2激光加热局域热固定LiNbO3光折变全息的温度影响[J]. 中国激光, 2000, 27(12): 1111. 李建郎, 刘立人, 刘友文, 周常河. Temperature Dependence of the Photorefractive Hologram Locally Thermo-fixed by CO2 Laser Heating LiNbO3[J]. Chinese Journal of Lasers, 2000, 27(12): 1111.
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